powerpc/mm: remove flush_tlb_page_nohash

This should be same as flush_tlb_page except for hash32. For hash32
I guess the existing code is wrong, because we don't seem to be
flushing tlb for Hash != 0 case at all. Fix this by switching to
calling flush_tlb_page() which does the right thing by flushing
tlb for both hash and nohash case with hash32

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/include/asm/book3s/64/tlbflush-hash.h

@@ -75,11 +75,6 @@ static inline void hash__flush_tlb_page(struct vm_area_struct *vma,
 {
 }
 
-static inline void hash__flush_tlb_page_nohash(struct vm_area_struct *vma,
-					   unsigned long vmaddr)
-{
-}
-
 static inline void hash__flush_tlb_range(struct vm_area_struct *vma,
 				     unsigned long start, unsigned long end)
 {

arch/powerpc/include/asm/book3s/64/tlbflush.h

@@ -57,14 +57,6 @@ static inline void local_flush_tlb_page(struct vm_area_struct *vma,
 	return hash__local_flush_tlb_page(vma, vmaddr);
 }
 
-static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
-					 unsigned long vmaddr)
-{
-	if (radix_enabled())
-		return radix__flush_tlb_page(vma, vmaddr);
-	return hash__flush_tlb_page_nohash(vma, vmaddr);
-}
-
 static inline void tlb_flush(struct mmu_gather *tlb)
 {
 	if (radix_enabled())

arch/powerpc/include/asm/tlbflush.h

@@ -54,7 +54,6 @@ extern void __flush_tlb_page(struct mm_struct *mm, unsigned long vmaddr,
 #define flush_tlb_page(vma,addr)	local_flush_tlb_page(vma,addr)
 #define __flush_tlb_page(mm,addr,p,i)	__local_flush_tlb_page(mm,addr,p,i)
 #endif
-#define flush_tlb_page_nohash(vma,addr)	flush_tlb_page(vma,addr)
 
 #elif defined(CONFIG_PPC_STD_MMU_32)
 

arch/powerpc/mm/pgtable.c

@@ -225,7 +225,7 @@ int ptep_set_access_flags(struct vm_area_struct *vma, unsigned long address,
 		if (!is_vm_hugetlb_page(vma))
 			assert_pte_locked(vma->vm_mm, address);
 		__ptep_set_access_flags(ptep, entry);
-		flush_tlb_page_nohash(vma, address);
+		flush_tlb_page(vma, address);
 	}
 	return changed;
 }

arch/powerpc/mm/tlb_hash32.c

@@ -48,17 +48,6 @@ void flush_hash_entry(struct mm_struct *mm, pte_t *ptep, unsigned long addr)
 }
 EXPORT_SYMBOL(flush_hash_entry);
 
-/*
- * Called by ptep_set_access_flags, must flush on CPUs for which the
- * DSI handler can't just "fixup" the TLB on a write fault
- */
-void flush_tlb_page_nohash(struct vm_area_struct *vma, unsigned long addr)
-{
-	if (Hash != 0)
-		return;
-	_tlbie(addr);
-}
-
 /*
  * Called at the end of a mmu_gather operation to make sure the
  * TLB flush is completely done.